I have tried depositing metal colloidal films on glass slides (paper attached). They reported particles sizes using AFM image analysis which is very small compared to what I have got. It could be because of experimental errors. But I am confused if by particle size, it means the mean diameter or the particle height? Because the height (z average) of my particles falls in the size range mentioned in the papers. I am also attaching my AFM image, I am using Gwyddion for analysis.
If the particles are spherical then the height (which AFM measures) and the diameter will be the same. If the particles are irregular (consider for example a plate) then you'll be measuring the depth/height of the particle.
If the particles are spherical then the height (which AFM measures) and the diameter will be the same. If the particles are irregular (consider for example a plate) then you'll be measuring the depth/height of the particle.
Alan F Rawle thanks for the answer but I am not sure the particles are exactly spherical. So when the authors say "size" they mean the height?
'Size' is an ambiguous abstract term dependent on the technique used to evaluate it. That's why ISO prefers to use the symbol x for size as 'd' implies diameter and therefore a sphere. All sizing techniques have to work with some form of equivalent (circular or spherical usually) in order to be able to plot a single (equivalent) figure on the x-axis. More junk in the attached and webinar:
Basic Principles of Particle Size Analysis http://tinyurl.com/zo6mfgz
I think u can find the particle height via height profile of AFM micrographes.
Ali Dehghani yeah I got my particle height calculated as well as a mean particle radius. I was only getting confused because the results published in the paper I'm following only mention particle "size" and this "size" is matches my partciles' height not their radius. so i was wondering if in general people refer to the afm height measurements as particle size.
Arti Tyagi Please read my response again. 'Particle Size' is an ambiguous term.
Alan F Rawle thanks again. I have already read and understood your response and hence replied to it.
I explained my confusion to Mr. Ali Dehghani because from his answer I got the feeling that perhaps he hasn't read the whole thing. In fact, my problem still remains unsolved because I was hoping this is some sort of terminology used while reporting AFM results but so far the answer seems to be no, as you have pointed out size is an ambiguous term.
Arti Tyagi There is no ‘problem’ to solve. A statement of fact is simply that - a fact.
Alan F Rawle sorry, but perhaps if you had tried to understand the question posted. Anyways, I appreciate the time you spent on this. Thank you, again.
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